CN103310855A - Liquid heavy metal cooling reactor fuel assembly - Google Patents
Liquid heavy metal cooling reactor fuel assembly Download PDFInfo
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- CN103310855A CN103310855A CN2013101956446A CN201310195644A CN103310855A CN 103310855 A CN103310855 A CN 103310855A CN 2013101956446 A CN2013101956446 A CN 2013101956446A CN 201310195644 A CN201310195644 A CN 201310195644A CN 103310855 A CN103310855 A CN 103310855A
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- outer tube
- tube sleeve
- bunchy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention provides a liquid heavy metal cooling reactor fuel assembly, and belongs to the field of nuclear engineering. The assembly comprises a fuel system and a counterweight system which is used for fixing the fuel assembly, wherein the fuel system comprises a fascicular fuel element, a metal winding wire, an upper tube socket and a lower tube socket which are used for fixing the fuel element, an outer tube sleeve and coolant inlets; and the counterweight system comprises a counterweight filler, a counterweight outer tube sleeve, a center bearing rod, a flange and the like. According to the invention, the fuel assembly can be fixed in the liquid lead base alloy coolant by utilizing own gravity, has inherent safety and can be used for reducing risks of a fuel operating accident and a rod ejection accident in utmost accidents. The fuel assembly provided by the invention is suitable for reactors of which the coolant is a liquid heavy metal with high density.
Description
Technical field
The present invention relates to a kind of liquid heavy metal cooled reactor fuel assembly, be applicable to the reactor that cooling medium is chosen as the larger liquid heavy metal alloy of density, belong to the nuclear engineering field.
Background technology
The world today has to face the treatment and disposal difficult problem of nuke rubbish when utilizing nuclear energy.The Accelerator Driven Subcritical system is a kind of desirable nuke rubbish transmuting device, liquid heavy metal lead base alloy is the main candidate material of present Accelerator Driven Subcritical reactor coolant owing to having good neutronics characteristic, security feature and heat-transfer capability.But because the density of liquid heavy metal density ratio fuel assembly is larger, therefore be different from water-cooled reactor, the fuel assembly of traditional structure can't rely on self gravitation and is fixed in the reactor core in the reactor of liquid heavy metal as cooling medium.
At present, the domestic design studies work of also not carrying out liquid towards heavy metal cooled reactor fuel assembly structure.Only there is in the world a few countries possessing some special knowledge aspect this, in the XADS of the European Union project, adopt the mode of mechanical interlocking in the structural design of fuel assembly, being about to fuel assembly bottom and reactor core locks by a kind of physical construction, complex structural designs is meticulous, and difficulty of processing is large, and does not also solve fuel assembly floating, swing and the pinpoint problem of how solving in the process of reloading, therefore material-changing device need design complexity, the process operation time of reloading is longer.Simultaneously, because Service Environment is harsh in the liquid heavy metal cooled reactor heap, component count is many in the reactor core, and the refulling cycle is long, and the fixed form of mechanical interlocking has increased the under arms fixing and work accident of phase in longevity fuel assembly, the risk of control rod ejection accident.In the ALFRED of Europe Nuclear Energy Agency ENEA and the ELFR project, fuel assembly adopts the counterweight mode to be fixed, in this project Weighting system is installed on the fuel system, by pressure vessel etc. two systems are separated, and Weighting system is exposed in the external environment condition, increased the design difficulty of reactor core and the risk that radiant matter is revealed, and in accordance with design criterias such as fuel assembly self-supports.
To sum up, the shortcoming of known liquid heavy metal cooled reactor fuel assembly structure design existence has:
Adopt the fixed form of locking, complex structural designs is meticulous, and difficulty of processing is large, and the material-changing device design is complicated, and the working time of reloading is longer, has greatly increased the under arms fixing and work accident of phase in longevity fuel assembly, the risk of control rod ejection accident.
Employing is installed in Weighting system the mode of fuel system upper end, and Weighting system is exposed in the external environment condition, has increased the design difficulty of reactor core and the risk that radiant matter is revealed, and in accordance with design criterias such as fuel assembly self-supports.
Summary of the invention
The objective of the invention is: overcome existing design abroad complex structure meticulous, difficulty of processing is large, the shortcomings such as accident risk height, a kind of liquid heavy metal cooled reactor fuel assembly is provided, has simplicity of design, have inherent safety, the advantage such as material-changing device is simple can generally be used for the reactor of liquid heavy metal as cooling medium.
Technical scheme of the present invention is: a kind of liquid heavy metal cooled reactor fuel assembly comprises: fuel system 1 and be used for the Weighting system 2 of fixed fuel assembly; Described fuel system 1 comprises the fuel element 3 of bunchy and is used for fixedly metal wrapping wire 4, fuel outer tube sleeve 5, upper base 6, bottom nozzle 7 and the coolant entrance 8 of bunchy fuel element 3; Described Weighting system 2 is comprised of counter weight filler 9, counterweight outer tube sleeve 10, center force bearing bar 11 and flange 12; Fixing with metal wrapping wire 4 between the fuel element 3 of bunchy, fuel element 3 two ends of bunchy are separately fixed on base 6 and the bottom nozzle 7, and are fixing with metal wrapping wire 4 between the fuel element 3 of bunchy; Fuel outer tube sleeve 5 two ends weld together with upper base 6, bottom nozzle 7 respectively; Coolant entrance 8 is connected by flange 12 with Weighting system 2; Described outer tube sleeve 10 sealed bottoms; Counter weight filler 9 is packed in the counterweight outer tube sleeve 10, and top is by flange 12 sealings; It is the most central that center force bearing bar 11 is installed in the fuel element 3 of bunchy, runs through fuel system 1 and Weighting system 2, is positioned at the part of Weighting system 2 with external thread, and screw with Weighting system 2 and to be connected.
Described upper base 6 is identical with bottom nozzle 7 structures, and the fuel element 3 two ends end plugs of bunchy insert respectively in the aperture of base 6 and bottom nozzle 7 fixing.Fix with the metal wrapping wire between the fuel element 3 of bunchy.Cooling medium flows between the space by bottom nozzle 7, fully contacts with bunchy fuel element 3, utilize metal wrapping wire 4 fixedly bunchy fuel element 3 and form coolant flow passages, final cooling medium flows out from the space of upper base 6.
The counter weight filler 9 of described Weighting system 2 must select density ratio as the larger metal of liquid heavy metal density of reactor coolant, and density range is from 10g/cm
3---25g/cm
3By calculating the volume and weight of a whole set of fuel assembly, obtain the average density of described fuel assembly, under the prerequisite that reserves the safe enough allowance, make the average density of described whole box fuel assembly greater than the density of liquid lead-containing alloy, gravity is fixed in the reactor core thereby described whole box fuel assembly can paddle one's own canoe.
Described Weighting system 2 centers have tapped hole, when mounted, slowly on the externally threaded center of the precession band force bearing bar 11, after being in place, the screw 13 on the flange 12 is screwed, thereby fuel system 1 is connected together with Weighting system 2.Because after adding Weighting system 2, the weight of a whole set of fuel assembly is larger, simple rely on outer tube sleeve 5 can not guarantee install and the process of reloading in structural stability, therefore increase a center force bearing bar 11 at described fuel assembly center, be used for installing and the process of reloading is born the weight of counterweight.Adopt mode dead center force bearing bar and the Weighting system of screw thread, have stressed evenly, not yielding, process the advantages such as simple.
Described coolant entrance 8 diameter ranges are 1/4～4/5 of described outer tube sleeve 5 diameters, and purpose is under the prerequisite of Natural Circulation, and liquid heavy metal cooling medium can enter reactor core inside from the reactor core outside smoothly.Each face of the hexagon of described coolant entrance 8 all has the strip hole, thereby make cooling medium enter inside from described fuel assembly outside, after described fuel element 3 contacts, from described upper base 6 spaces, flow out, by calculating, under the prerequisite that guarantees structural stability, the strip hole is enlarged as far as possible, thereby make liquid heavy metal cooling medium enter inside from described fuel assembly outside smoothly.
The present invention's advantage compared with prior art is: the invention enables the gravity of described fuel system utilization own can realize fixing in liquid lead-containing alloy cooling medium, have inherent safety, reduced the risk of fuel handling accident and control rod ejection accident in the limiting fault.The present invention is applicable to the reactor that cooling medium is the larger liquid heavy metal of density.
Description of drawings
Fig. 1 is agent structure schematic diagram of the present invention;
Fig. 2 is cut-away view of the present invention;
Fig. 3 is upper bottom nozzle schematic diagram of the present invention;
1. fuel system wherein; 2. Weighting system.; 3. fuel element; 4. metal wrapping wire; 5. burning outer tube sleeve; 6. go up base; 7. bottom nozzle; 8. coolant entrance; 9. counter weight filler; 10. counterweight outer tube sleeve; 11. center force bearing bar; 12. flange; 13. screw.
Embodiment
Below in conjunction with accompanying drawing 1-3 a kind of liquid lead-containing alloy cooling fast neutron reactor fuel assembly that the present invention proposes is further introduced:
As shown in Figure 1, 2, 3, upper base 6 and burning outer tube sleeve 5 is welded together after, the fuel element 3 upper end end plugs of bunchy are inserted in the aperture of upper base 6 fixing.Fixing with metal wrapping wire 4 between the fuel element 3 of bunchy, again the fuel element 3 lower end end plugs of bunchy are inserted in the aperture of bottom nozzles 7 fixingly, after installing, bottom nozzle 7 and burning outer tube sleeve 5 are also welded together.Adjust coolant entrance 8 hexagonal positions, its hexagon with burning outer tube sleeve 5 is coincide after, weld.With the center that center force bearing bar 11 inserts combustion system 1, it is positioned at the part of Weighting system 2, with external thread.Weighting system 2 centers have tapped hole, when mounted, slowly on the externally threaded center of the precession band force bearing bar 11, after being in place, the screw 13 on the flange 12 is screwed, thereby fuel system 1 is connected together with Weighting system 2.
Whole box fuel assembly grasps center force bearing bar 11 and upper base 6 by material-changing device when installing and reload, and by root described whole box fuel assembly is operated, and puts on the position of reactor core appointment.
The content that is not described in detail in the instructions of the present invention belongs to the known prior art of this area professional and technical personnel.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. liquid heavy metal cooled reactor fuel assembly is characterized in that comprising: fuel system (1) and be used for the Weighting system (2) of fixed fuel assembly; Described fuel system (1) comprises the fuel element (3) of bunchy and is used for fixedly metal wrapping wire (4), fuel outer tube sleeve (5), upper base (6), bottom nozzle (7) and the coolant entrance (8) of bunchy fuel element (3); Described Weighting system (2) is comprised of counter weight filler (9), counterweight outer tube sleeve (10), center force bearing bar (11) and flange (12); Fixing with metal wrapping wire (4) between the fuel element of bunchy (3), the fuel element of bunchy (3) two ends are separately fixed on base (6) and the bottom nozzle (7), and are fixing with metal wrapping wire (4) between the fuel element of bunchy (3); Fuel outer tube sleeve (5) two ends weld together with upper base (6), bottom nozzle (7) respectively; Coolant entrance (8) is connected by flange (12) with Weighting system (2); Described outer tube sleeve (10) sealed bottom; Counter weight filler (9) is packed in the counterweight outer tube sleeve (10), and top is by flange (12) sealing; It is the most central that center force bearing bar (11) is installed in the fuel element (3) of bunchy, runs through fuel system (1) and Weighting system (2), is positioned at the part of Weighting system (2) with external thread, and screw with Weighting system (2) and to be connected.
2. fuel assembly according to claim 1, it is characterized in that: described upper base (6) is identical with bottom nozzle (7) structure.
3. fuel assembly according to claim 1 is characterized in that: the fuel element of described bunchy (3) two ends end plug inserts respectively in the aperture of base (6) and bottom nozzle (7) fixing.
4. fuel assembly according to claim 1 is characterized in that: described counterweight outer tube sleeve (10) bottom is identical with fuel outer tube sleeve (5) bottom shape, is hexagon, and interior external radius is identical.
5. fuel assembly according to claim 1 is characterized in that, described counter weight filler (9) must select density ratio as the larger metal of liquid heavy metal density of reactor coolant, and density range is from 10g/cm
3---25g/cm
3
6. fuel assembly according to claim 1, it is characterized in that: described Weighting system (2) center has tapped hole, when mounted, slowly on the externally threaded center of the precession band force bearing bar (11), after being in place, screw (13) on the flange (12) is screwed, thereby fuel system (1) is connected together with Weighting system (2).
7. fuel assembly according to claim 1, it is characterized in that: described coolant entrance (9) diameter range is 1/4～4/5 of described burning outer tube sleeve (5) diameter, hexagonal each face all has the strip hole, thereby make cooling medium enter inside from described fuel assembly outside, after described fuel element (3) contacts, from described upper base (6) space, flow out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310195644.6A CN103310855B (en) | 2013-05-23 | 2013-05-23 | A kind of liquid heavy metal cooled reactor fuel assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310195644.6A CN103310855B (en) | 2013-05-23 | 2013-05-23 | A kind of liquid heavy metal cooled reactor fuel assembly |
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| Publication Number | Publication Date |
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| CN103310855A true CN103310855A (en) | 2013-09-18 |
| CN103310855B CN103310855B (en) | 2015-11-04 |
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| CN201310195644.6A Expired - Fee Related CN103310855B (en) | 2013-05-23 | 2013-05-23 | A kind of liquid heavy metal cooled reactor fuel assembly |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104039066A (en) * | 2014-06-23 | 2014-09-10 | 中国科学院合肥物质科学研究院 | Wrapping-wire type windowed target system |
| CN104200851A (en) * | 2014-09-16 | 2014-12-10 | 中国科学院合肥物质科学研究院 | Supporting grid framework for fuel rod of wire winding assembly of liquid heavy metal cooled reactor |
| CN105244067A (en) * | 2015-08-25 | 2016-01-13 | 中国科学院合肥物质科学研究院 | Reactor shielding layer component with high density and large neutron-absorption cross section |
| CN106531263A (en) * | 2016-12-29 | 2017-03-22 | 中国科学院合肥物质科学研究院 | Zero power physical experimental device for lead-base reactor |
| CN106531232A (en) * | 2016-12-29 | 2017-03-22 | 中科瑞华原子能源技术有限公司 | Fuel assembly available for integral replacement |
| CN106782684A (en) * | 2017-02-09 | 2017-05-31 | 中科瑞华原子能源技术有限公司 | For the fixed fuel assembly of wrapping wire and lead base reactor of high power density reactor core |
| CN106782682A (en) * | 2016-12-30 | 2017-05-31 | 清华大学天津高端装备研究院 | A kind of fuel assembly for lead bismuth heap |
| CN108597625A (en) * | 2018-05-08 | 2018-09-28 | 西安交通大学 | A kind of experimental provision for studying fusant migratory behaviour in lead base reactor cluster channel |
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| US4344915A (en) * | 1980-09-17 | 1982-08-17 | The United States Of America As Represented By The United States Department Of Energy | Nuclear reactor fuel rod attachment system |
| US4642217A (en) * | 1984-07-26 | 1987-02-10 | Westinghouse Electric Corp. | Fuel rod for a nuclear reactor having an improved end plug assembly |
| CN101939793A (en) * | 2007-09-26 | 2011-01-05 | 德尔诺瓦维斯公司 | Nuclear reactor, in particular pool-type nuclear reactor, having new concept fuel elements |
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2013
- 2013-05-23 CN CN201310195644.6A patent/CN103310855B/en not_active Expired - Fee Related
Patent Citations (3)
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| US4344915A (en) * | 1980-09-17 | 1982-08-17 | The United States Of America As Represented By The United States Department Of Energy | Nuclear reactor fuel rod attachment system |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104039066B (en) * | 2014-06-23 | 2016-08-17 | 中国科学院合肥物质科学研究院 | A kind of around the fenestrate target system of wire type |
| CN104039066A (en) * | 2014-06-23 | 2014-09-10 | 中国科学院合肥物质科学研究院 | Wrapping-wire type windowed target system |
| CN104200851A (en) * | 2014-09-16 | 2014-12-10 | 中国科学院合肥物质科学研究院 | Supporting grid framework for fuel rod of wire winding assembly of liquid heavy metal cooled reactor |
| CN105244067B (en) * | 2015-08-25 | 2017-08-25 | 中国科学院合肥物质科学研究院 | A kind of high density and the reactor shielding layer assembly of big neutron absorption cross-section |
| CN105244067A (en) * | 2015-08-25 | 2016-01-13 | 中国科学院合肥物质科学研究院 | Reactor shielding layer component with high density and large neutron-absorption cross section |
| CN106531232B (en) * | 2016-12-29 | 2017-09-22 | 中科瑞华原子能源技术有限公司 | A kind of fuel assembly that can be used for integration to reload |
| CN106531232A (en) * | 2016-12-29 | 2017-03-22 | 中科瑞华原子能源技术有限公司 | Fuel assembly available for integral replacement |
| CN106531263A (en) * | 2016-12-29 | 2017-03-22 | 中国科学院合肥物质科学研究院 | Zero power physical experimental device for lead-base reactor |
| CN106531263B (en) * | 2016-12-29 | 2018-03-23 | 中国科学院合肥物质科学研究院 | A kind of lead base heap zero energy physics facility |
| CN106782682A (en) * | 2016-12-30 | 2017-05-31 | 清华大学天津高端装备研究院 | A kind of fuel assembly for lead bismuth heap |
| CN106782684A (en) * | 2017-02-09 | 2017-05-31 | 中科瑞华原子能源技术有限公司 | For the fixed fuel assembly of wrapping wire and lead base reactor of high power density reactor core |
| CN106782684B (en) * | 2017-02-09 | 2018-06-19 | 中科瑞华原子能源技术有限公司 | For the fixed fuel assembly of wrapping wire and lead base reactor of high power density reactor core |
| CN108597625A (en) * | 2018-05-08 | 2018-09-28 | 西安交通大学 | A kind of experimental provision for studying fusant migratory behaviour in lead base reactor cluster channel |
| CN108597625B (en) * | 2018-05-08 | 2019-04-09 | 西安交通大学 | A kind of experimental provision for studying fusant migratory behaviour in lead base reactor cluster channel |
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| Publication number | Publication date |
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| CN103310855B (en) | 2015-11-04 |
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